61244003240 has 128 divisors (see below), whose sum is σ = 158966461440. Its totient is φ = 20801028096.

The previous prime is 61244003239. The next prime is 61244003281. The reversal of 61244003240 is 4230044216.

It is a super-2 number, since 2×61244003240² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22132337 + ... + 22135103.

It is an arithmetic number, because the mean of its divisors is an integer number (1241925480).

Almost surely, 2^61244003240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61244003240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79483230720).

61244003240 is an abundant number, since it is smaller than the sum of its proper divisors (97722458200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61244003240 is a wasteful number, since it uses less digits than its factorization.

61244003240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499 (or 3495 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 61244003240 its reverse (4230044216), we get a palindrome (65474047456).

The spelling of 61244003240 in words is "sixty-one billion, two hundred forty-four million, three thousand, two hundred forty".